Improvement in steam-blowers



No. 48,850. PATENTED JULY 18, 1865.

J. W. STEVENS. STEAM BLOWER.

J F g i m: onms PETERS ca, mmo-u'ma, wAsHlNoYoN o c UNITED STATES PATENTOFFICE.

JOHN W. STEVENS, OF SOUTH DAnvEns, MASSACHUSETTS.

IMPROVEMENT IN STEAM-BLOWERS.

Specification forming part of Letters Patent No. 48,850, dated July 18,1865.

To all whom it may concern:

Be it known that 1, JOHN W. STEVENS, of South Danvers, in the county ofEssex and State of Massachusetts, have invented animprovetlfiteam-Blower; and I do hereby declare that the following,taken in connection with the drawings which accompany and'formpart ofthisspecification, is adescription' of my invention sufficient to enablethose skilled in the art to practice it.

In the use of such steam-blowers as are placed outside of the ash-pitsofsteam-boiler furnaces to maintain, urge, and increase combustion of thefuel it is found very difficult, if notimposbie, to maintain orimprovecombustion in furnaces in which bagasse, wet tau, coal-dust, sawdust,and like fine substances areemployed for fuel, the reasons for which itis not herein necessary to specifyrand in the use of such steam-blowersas are placed within the ash-pit a-frequent cause of imperfect action isfound in the tendency of the steam-jet holes to clog with ashes and finefuel.

The blower constructed by me is intended to and does obviate thesedifiiculties. placed within the ash-pit, with the holes in the pipe soarranged that the steam is driven upward directly into theincandescent-fuel; and my invention consists in the application theretoof a blow-oil cock, by which the direction- I of the steam-current maybe changed, issuing in a. jet so much larger than the diameterofthe'blower-holes that all deposits of ashes and other fine substancesmay be blown from the pipe, whenever necessity may require it, by simplyopening this blow-0d cock under pressure of thesteam;

A blower embodying-this improvement is shown in plan in Figure 1, and inside view in Fig. 2.

therefrom.

It is a denotesthe steam-pipe from the boiler; .b, the blower, which isshown as composed'of a circular pipe and n return-pipe, c, which areplaced horizontally in the ash pit under the grate-bars, theseblower-pipes having holes through their upper surfaces, through whichthe steam issues in jets to urge the combustion of the fuel. The pipe 0at its front end is provided with astop-cock, d, the eduction-orifice ofwhich is prefernblyjust without the ash-pit door.

n will be erident that it the cock dis closed the steam will be forceddirectly into the body of fuel, and. that'whenever the pipes b and 0become clogged with ashes or other deposit, by simply opening the cockcl with full pressure of steam, or such pressure as may be necessary,such deposit will" be blown through the pipes, leaving the blowerentirely or practically freed JOHN W. s'rEvENs.

Witnesses:

FRANCIS GOULD, I W. B. GLEASON. .l

In the use of tine fuel .thie cleans-

